James hodgson pierce



(No Model.)

` J. H. PIERCE.

VALVE.

No. 534,228. vlafmellted Feb. 12,'1895.

mlnnllilummlyn "Nrrngn STATES PATENT tries.

JAMES HODGSON PIERCE, OF VEST BAY CITY, MICHIGAN, ASSIGNCR OF FIFTEENSIXTEENTHS TO ISAAC PIERCE, OF SAME PLACE.

VALVE.

SPECIFICATION forming part of Letters Patent N o. 534,228, dated February 12, 1895.

Application filed September l5, 1893. Serial No. 485,540. (No model.)

To @ZZ whom it may concern:

Be it known that I, J AMES HoDcsoN PIERCE, a citizen of the United States, residing at West Bay City, in the county of Bay and State of Michigan, have invented a new and useful Improvement in Valves, of which the following is a specification.

This invention relates to that class of valves which are provided with a disk or frusturn of a cone which is attached to a spindle and moved by the latter toward and from its seat.

One object of my invention is to improve the valve casing of a straight-way valve in such manner that the body is reduced in length and height, While the flow of the Huid through the same is not retarded.

Another object of my invention is to improve the stuffing box through which the valve stem passes.

In the accompanying drawings: Figure lis alongitudinal sectional elevation of a straight- Way valve provided with my improvements. Fig. 2 is a cross section in line 2 2, Fig. 1. Fig. 3 is a horizontal section in line 3 3, Fig. 1, looking upward. Fig. 4 is a bottom plan view of the valve casing. Fig. 5'is a detached sectional elevation of the valve and packing, showing the valve engaged with the gland of the stufng box. Eig. 6 is a sectional View of the valve and gland, in line 66, Fig. 5, looking downward. Fig. 7 is a sectional elevation of the valve and stufling box,`showing a slightly modified construction thereof.

Like letters of reference refer to like parts in the several figures.

A represents the cylindrical' main portion of the casing or body of a straight-way valve, provided at both ends with internally-threaded openings a in the usual manner and with an inclined cylindrical top portion A having an internallythreaded opening a.

b represents the internal diaphragm in which the passage way or opening is formed which is surrounded by the valve seat b. This diaphragm is connected along its upper edge with the upper portion of the valve body by a curtain b2 in the usual manner.

C' represents the valve and D the stem to which it is attached. This stem is preferably arranged at a rather steep angle to the axis of the valve body, usually at about sixty degrees, which arrangement permits the valve body to be made rather short and the top of the body to be made rather low, thereby rendering the valve compact and reducing its cost. l

The steep angle of the stem places the diaphragm b at a correspondingly flat angle in the valve body. In order to avoid the constriction of the flow passage underneath the diaphragm, whichA would result therefrom, the cavity of the body is enlarged underneath the diaphragm by lateral bulges e, which are formed by making the bottom of the body at that point dat and joining it by upwardly converging sides to the upper part of the main portion of the body, which part retains the general cylindrical form of the main portion. This construction provides an ample flow passage underneath the diaphragm without materially increasing the weight of the-A valve body.

F represents the cap which is screwed into the inclined top A of the valve casing and Which contains the stuffing box through which the valve stern passes. This stuflng box is arranged on the inner side of the cap, so as to open into the cavity of the valve casing.

g represents the packing arranged in the stuffing box and composed preferably of a wire of soft metal, or some other permanent or indestructible packing which retains its eiiciency for a long time.

G represents the gland of the stuffing box which is screwed into the same from the inner side.

The stuffing box is properly packed in the shop Where the valve is constructed and the packing is not ordinarily required to be afterward tightened or renewed.

In order to provide means for tightening the packing without removing the cap and connecting parts from the valve body, the valve or its stem is provided on the inner side of the gland with one or more lips 72, which project toward the gland, and the latter is provided with a corresponding number of fiat .sides 1'., as represented in Figs l, 3 and 6.

Upon unscrewing the valve from its seat until these lips engage against the flat sides of IOO the gland can be turned merely by the fric- I tional contact of the back of the valve against the lower side of the gland.

It is obvious that the construction and arrangement of the stuffing box herein shown and described is applicable, not only to t straght-way valves but also to other Valves in which the valve disk is attached to a stern which passes through a stuffing box, for instance globe valves.

K represents the hand wheel which is mounted on the valve stem and provided with a hollow shank k having an external screw thread which works in an internally-threaded cavity l formed in the outer portion ot' the` cap F of the valve body. The spindle is free to turn in the shank of the hand wheel but is compelled to follow the axial movement thereof toward and from the valve seat by a shoulder m and washer at', as usual in loose spindle valves. The outer end of the spindle is made square or otherwise so shaped that a tool can be applied to it for turning the spindle in grinding the valve to its seat.

I claim as my inventionl. A body for straight-way valves composed of a cylindrical main portion and a cylindrical top portion arranged at an oblique angle to the main portion and' providedat its inner end with an inclined diaphragm having a valve-controlled passage, the cylindrical main portion having, below said diaphragm, a dat bottom and upwardly converging sides, forming lateral enlargements in the lower portion of the cavity below said diaphragm, substantiall-y as set forth. t

2. The combination with a valve casing or body, the Valve and its stein, of a cap through i which the stem passes, a stutn-g box arranged in the inner portion ot said cap and having its gland projecting into the cavity of the 4valve casing or body,` and means, substantially as described, whereby the valve can be engaged with the gland for turning the same, substantially as set forth.

5S Witness my hand this 25th day of August,

Witnesses:

LEE E. J OsLYN,

ISAAC PIERCE. 

